Good ozone is made of three oxygen atoms(原子) joined together. Similarly,bad ozone is made in the same way.But how can we tell the ozone is good or bad? It depends on where we find it. Good ozone is found high above the earth. Bad ozone is found close to the ground.Good ozone ...
When cosmic inflation came to a sudden and still mysterious end, the more classic descriptions of the Big Bang took hold. A flood of matter and radiation, known as "reheating," began populating our universe with the stuff we know today: particles, atoms, the stuff that would become stars a...
Is the olfactory bulb made of white or gray matter? What is the transmittance at a given wavelength if 90% of the light at that wavelength is absorbed? How is light reflected? When light rays are refracted they Sunlight exhibits what...
aan administration by contract as opposed to trust, where the director would have a pecuniary interes in lowering the average rate of mortality. 管理由合同与信任相对,主任在降低死亡率的平均率会有金钱interes。[translate] ais that NO2 can absorb sunlight and break apart to produce oxygen atoms that...
Ultraviolet light causes sunburn whereas visible light even of greater intensity, does not? Why is this so? If atoms exist, why can't we see them with visible light? If a fish wore goggles above water surface, why would vision be better for the fish if the googles were filled with water...
The process of adding differently charged atoms, called doping, allows manufacturers to finely control the way electricity moves through the material. Semiconductors made this way have details that are single-digit numbers of nanometers wide. Transistors made from "stripes" of differently doped silicon...
The lantern light was flickering its last lightas she drew the heavy curtains together. She welcomed the shadows that darkened the corners of the room. She wanted the room dark. It helped her to think. In sunlight there were too many distractions in the room, from the collection of beautifu...
aMacromolecule. A huge molecule made up of thousands of atoms. 大分子。 一个巨大的分子由数以万计原子做成。[translate] aGolden Archives 金黄档案[translate] aI like to talk to you... 我喜欢与您谈话...[translate] aThe sunlight is very good, she is very good too 阳光是非常好,她也是非常...
Keep the sun's brightness the same, but shrink the sun until it appears in the sky like a tiny star, like an extremely intense pinpoint. Now just use any big lens to gather a square meter of sunlight, focus it down to 1mm, then collimate it with a 1mm water-cooled short-focus quar...
When Newton did his famous experiment with a prism and sunlight, he noted that the Sun produced a “rainbow” of colors. This is a continuous spectrum. However if he had been able to produce a more detailed spectrum he would have noticed some subtleties on this continuous spectrum. So, lig...